This is the archive of the old posts from Djape .Net, more or less as they used to be. Please go to to see the new website.

Tag Archives: solving technique


The rules of Futoshiki are very simple: 1. The grid is square and can be of any size. Use numbers 1 to the size of the grid to solve the puzzle. 2. Numbers cannot be repeated in a row or column. All numbers must appear in each row and in each column. 3. The “more […]
Futoshiki plus gifts

Posted in Free sample puzzles, General | Also tagged , , , , , , , , | 1 Response

Odd Even Sudoku

Merry Christmas to all who celebrate this day! 🙂 As a small gift for you, I’ve prepared an odd-even sudoku variation puzzle. It’s not the first odd even puzzle I ever posted, but it is the first plain odd even sudoku. And to spice things up a little bit, this is a very difficult odd/even […]
Loco Sudoku Puzzle Book Cuckoo Wacky Quirky

Posted in Free sample puzzles, Sudoku Variants | Also tagged , , , , , , , , , , | 4 Responses

How to solve Diagonal Sudoku X

I realize that I’ve never posted two sudoku solving techniques which are specific to Diagonal Sudoku puzzles. Here they are. Diagonal and nonet interaction This one is a simple extension of the “row/column and nonet interaction technique”. Just look at this sample puzzle which has been solved using the standard techniques up to this point: […]
Posted in Solving tips, Sudoku Variants | Also tagged , , , , , , , , | Leave a comment


Here we go… another “classic” Sudoku that I can’t remember posting before. Twodoku is a Gattai-2 puzzle, which means that there are two overlapping Sudokus. It’s a tough one, I think. In order to solve it, you should use all classic Sudoku solving techniques, but it would help if you also knew how to apply […]
Flower Sudoku, Gattai 5 in 1 Su Doku

Posted in Free sample puzzles, Sudoku Variants | Also tagged , , , , , , , , , , | Leave a comment

Butterfly Sudoku

I realized that I never posted a classic Butterfly Sudoku puzzle on the main page of the website. A few of them have been posted on the Daily Sudoku Variants page, but the puzzles posted there disappear from this website after a week. So… to rectify this issue, I am presenting you with a Butterfly […]
Loco Sudoku Puzzle Book Cuckoo Wacky Quirky

Posted in Free sample puzzles, Sudoku Variants | Also tagged , , , , , , , , , , , , , , , , | 2 Responses

Jigsaw Sudoku in Flower Sudoku format (5 in 1 Gattai-5)

This should be a tough one – perhaps too tough? It’s only rated “BRAIN”, but the layout makes it quite difficult, I think. 5 overlapping Jigsaw Sudoku puzzles put together in the Flower Sudoku (Gattai-5) layout, which is similar to Samurai Sudoku but not exactly the same. Make sure to use the “Twin Nonets” solving […]
Jigsaw Samurai Sudoku book

Posted in Free sample puzzles, Jigsaw Sudoku, Samurai sudoku | Also tagged , , , , , , , , | 8 Responses


Here is a puzzle that I think deserves a lot of attention: TriDoku! It’s a great puzzle-type but for some reason it’s very rarely seen in the Sudoku world. I want to change that! Even though it may not appear obvious, there are 81 cells in this puzzle. And there are 9 nonets. Just like […]
Tridoku book Large print

Posted in Free sample puzzles, Sudoku Variants | Also tagged , , , , , , , , , , , , | 11 Responses

Introducing Slitherlink (loop the loop, takegaki, fences, dotty dilemma… you name it)

Another kind of puzzles that I’ve started creating recently… Slitherlink! These puzzles are also known under many different names. Slitherlink puzzles are not a Sudoku variant. They can be of any size and the rules are: 1. Connect the dots to form a single loop with no points of intersection. 2. The clues given tell […]

Posted in Free sample puzzles, Puzzle variants | Also tagged , , , , , , , , , , , , , | 5 Responses

My first Nurikabe puzzle (a difficult one)

Another addition to my portfolio of various number/logic puzzles are Nurikabe puzzles. I think these puzzles are being undeservedly somewhat neglected in the puzzle world and I intend to change that. The number of solving techniques and approaches that can be found in Nurikabe puzzles far exceeds any other puzzle type. For me it was […]
Difficult Nurikabe book

Posted in Free sample puzzles, General, Puzzle variants | Also tagged , , | 14 Responses

How to solve Hitori: basic techniques

Solving Hitori puzzles is about recognizing patterns. I will show you some examples of those patterns. They can be split into two groups, one of those that depend solely on the initial positioning of numbers, and another group of patterns that depend on the black and white cells which have been painted in the solving […]
Posted in Puzzle variants, Solving tips | Also tagged , , , , | Leave a comment
eXTReMe Tracker